Feldspar.
When a mineral breaks along a weakly-bonded plane, it is called cleavage. Cleavage is a property that describes how a mineral breaks along its crystal structure.
Whether a mineral has cleavage or fracture is determined by its internal atomic structure and the way in which it breaks when subjected to stress. Cleavage is the tendency of a mineral to break along planes of weakness, while fracture is the way a mineral breaks when no cleavage planes are present.
Cleavage is the tendency of materials to split along definite structural planes, yielding smooth surfaces. An example is shales or shists.
cleavage, if a natural property of the mineral (e.g. mica); or a fault, such as in a gemstone.
cleavage....
No, a mineral cannot have both fracture and cleavage. Fracture refers to the way a mineral breaks when no cleavage is present, whereas cleavage describes the way a mineral breaks along its planes of weakness. Minerals either exhibit fracture or cleavage, but not both at the same time.
When a mineral breaks with rough edges, it is called a "fracture." This is different from cleavage, which is when a mineral breaks along smooth, flat planes. Fracture can be described as conchoidal (shell-like), uneven, or fibrous.
Four common properties of minerals are hardness, luster, cleavage or fracture, and color. Hardness refers to the mineral's resistance to scratching, while luster describes how light reflects off the surface. Cleavage refers to how a mineral breaks along planes of weakness, and fracture describes irregular breaks. Color can vary among minerals but is not always a reliable indicator of mineral identification.
Calcite is the mineral that displays rhombohedral cleavage. Cleavage is the way a mineral breaks along certain planes of weakness, resulting in smooth, flat surfaces. In the case of calcite, it typically breaks along three cleavage planes at 75° and 105°, resulting in rhombohedral-shaped cleavage fragments.
cleavage
cleavage. Minerals can break along certain crystallographic planes due to the arrangement of their atoms, resulting in cleavage. Cleavage can be described as perfect, imperfect, or non-existent depending on the ease with which the mineral breaks.
cleavage.